215006566665 has 32 divisors (see below), whose sum is σ = 375332428800. Its totient is φ = 104232208320.

The previous prime is 215006566651. The next prime is 215006566667. The reversal of 215006566665 is 566665600512.

It is not a de Polignac number, because 215006566665 - 2⁹ = 215006566153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215006566667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1269876 + ... + 1429194.

It is an arithmetic number, because the mean of its divisors is an integer number (11729138400).

Almost surely, 2^215006566665 is an apocalyptic number.

It is an amenable number.

215006566665 is a deficient number, since it is larger than the sum of its proper divisors (160325862135).

215006566665 is a wasteful number, since it uses less digits than its factorization.

215006566665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167517.

The product of its (nonzero) digits is 1944000, while the sum is 48.

The spelling of 215006566665 in words is "two hundred fifteen billion, six million, five hundred sixty-six thousand, six hundred sixty-five".